power: supply: core: Simplify hwmon memory allocation

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2071846
Tested: This is one of a series of patch sets to enable Arm SystemReady IR
 support in the kernel for NXP i.MX8 platforms.  This set updates the
 power subsystem.  This set has been tested via simple boot tests and
 the CI loop.

commit a942f91
Author: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date:   Sat Feb 5 17:40:57 2022 +0100

    power: supply: core: Simplify hwmon memory allocation

    Use devm_bitmap_zalloc() instead of hand writing it.

    Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
    (cherry picked from commit a942f91)

Signed-off-by: Al Stone <ahs3@redhat.com>

Author: Al Stone

drivers/power/supply/power_supply_hwmon.c

@@ -324,11 +324,6 @@ static const struct hwmon_chip_info power_supply_hwmon_chip_info = {
 	.info = power_supply_hwmon_info,
 };
 
-static void power_supply_hwmon_bitmap_free(void *data)
-{
-	bitmap_free(data);
-}
-
 int power_supply_add_hwmon_sysfs(struct power_supply *psy)
 {
 	const struct power_supply_desc *desc = psy->desc;
@@ -349,18 +344,14 @@ int power_supply_add_hwmon_sysfs(struct power_supply *psy)
 	}
 
 	psyhw->psy = psy;
-	psyhw->props = bitmap_zalloc(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG + 1,
-				     GFP_KERNEL);
+	psyhw->props = devm_bitmap_zalloc(dev,
+					  POWER_SUPPLY_PROP_TIME_TO_FULL_AVG + 1,
+					  GFP_KERNEL);
 	if (!psyhw->props) {
 		ret = -ENOMEM;
 		goto error;
 	}
 
-	ret = devm_add_action_or_reset(dev, power_supply_hwmon_bitmap_free,
-			      psyhw->props);
-	if (ret)
-		goto error;
-
 	for (i = 0; i < desc->num_properties; i++) {
 		const enum power_supply_property prop = desc->properties[i];